如何使用JavaScript/jQuery获取表单数据?

是否有一种简单的单行方式来获取表单的数据，就像以经典的仅html方式提交表单一样?

例如:

<form>
    <input type="radio" name="foo" value="1" checked="checked" />
    <input type="radio" name="foo" value="0" />
    <input name="bar" value="xxx" />
    <select name="this">
        <option value="hi" selected="selected">Hi</option>
        <option value="ho">Ho</option>
</form>

输出:

{
    "foo": "1",
    "bar": "xxx",
    "this": "hi"
}

像这样的东西太简单了，因为它没有(正确地)包括文本区域，选择，单选按钮和复选框:

$("#form input").each(function () {
    data[theFieldName] = theFieldValue;
});

当前回答

使用.serializeArray()获取数组格式的数据，然后将其转换为对象:

function getFormObj(formId) {
    var formObj = {};
    var inputs = $('#'+formId).serializeArray();
    $.each(inputs, function (i, input) {
        formObj[input.name] = input.value;
    });
    return formObj;
}

2013-11-14 06:22:59

其他回答

$(form).serializeArray().reduce(function (obj, item) {
      if (obj[item.name]) {
           if ($.isArray(obj[item.name])) {
               obj[item.name].push(item.value);
           } else {
                var previousValue = obj[item.name];
                obj[item.name] = [previousValue, item.value];
           }
      } else {
           obj[item.name] = item.value;
      }

     return obj;
}, {});

它将修复问题:无法与多选择工作。

2016-10-29 07:30:27

$( "form" ).bind( "submit", function(e) { e.preventDefault(); console.log( $(this).serializeObject() ); //console.log( $(this).serialize() ); //console.log( $(this).serializeArray() ); }); $.fn.serializeObject = function() { var o = {}; var a = this.serializeArray(); $.each( a, function() { if ( o[this.name] !== undefined) { if ( ! o[this.name].push ) { o[this.name] = [o[this.name]]; } o[this.name].push(this.value || ''); } else { o[this.name] = this.value || ''; } }); return o; }; <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script> <form> <input type="radio" name="foo" value="1" checked="checked" /> <input type="radio" name="foo" value="0" /> <input name="bar" value="xxx" /> <select name="this"> <option value="hi" selected="selected">Hi</option> <option value="ho">Ho</option> </select> <input type="submit" value="Submit" /> </form>

Codepen

2019-10-29 03:58:49

你可以使用这个函数从表单中获取一个对象或JSON。

使用它:

var object = formService.getObjectFormFields（“#idform”）;

2016-07-07 14:37:55

这里是一个工作的JavaScript实现，它正确地处理复选框、单选按钮和滑块(也可能是其他输入类型，但我只测试了这些)。

function setOrPush(target, val) {
    var result = val;
    if (target) {
        result = [target];
        result.push(val);
    }
    return result;
}

function getFormResults(formElement) {
    var formElements = formElement.elements;
    var formParams = {};
    var i = 0;
    var elem = null;
    for (i = 0; i < formElements.length; i += 1) {
        elem = formElements[i];
        switch (elem.type) {
            case 'submit':
                break;
            case 'radio':
                if (elem.checked) {
                    formParams[elem.name] = elem.value;
                }
                break;
            case 'checkbox':
                if (elem.checked) {
                    formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
                }
                break;
            default:
                formParams[elem.name] = setOrPush(formParams[elem.name], elem.value);
        }
    }
    return formParams;
}

工作的例子:

编辑:

如果您正在寻找一个更完整的实现，那么请查看我为其制作的项目的这一部分。我最终会用我想出的完整解决方案来更新这个问题，但也许这对某人会有帮助。

2016-02-17 22:19:38

document.querySelector('form').addEventListener('submit', (e) => {
  const formData = new FormData(e.target);
  // Now you can use formData.get('foo'), for example.
  // Don't forget e.preventDefault() if you want to stop normal form .submission
});

这是一个吹毛求疵的答案，但让我解释为什么这是一个更好的解决方案:

We're properly handling a form submit rather than a button press. Some people like to push enter on fields. Some people use alternative input devices such as speech input or other accessibility devices. Handle the form submit and you correctly solve it for everyone. We're digging into the form data for the actual form that was submitted. If you change your form selector later, you don't have to change the selectors for all the fields. Furthermore, you might have several forms with the same input names. No need to disambiguate with excessive IDs and what not, just track the inputs based on the form that was submitted. This also enables you to use a single event handler for multiple forms if that is appropriate for your situation. The FormData interface is fairly new, but is well supported by browsers. It's a great way to build that data collection to get the real values of what's in the form. Without it, you're going to have to loop through all the elements (such as with form.elements) and figure out what's checked, what isn't, what the values are, etc. Totally possible if you need old browser support, but the FormData interface is simpler. I'm using ES6 here... not a requirement by any means, so change it back to be ES5 compatible if you need old browser support.

2017-09-23 06:13:39

如何使用JavaScript/jQuery获取表单数据?

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